Fearing a bottom-up failure of the auto industry if parts makers collapse, the Treasury announced $5 billion in loans for the auto suppliers in an effort to keep the industry running while the government works on a broader restructuring plan.

The financial woes of U.S. automakers have grabbed Washington's attention, but similar problems at auto suppliers have the potential to set off a cataclysmic chain of events in the industry if key parts makers run out of cash and fail.

General Motors Corp., pummeled by falling U.S. sales and high gas prices, lost the global sales lead to Toyota Motor Corp. in the first half of this year, but the churning market makes it difficult to predict which automaker will end the year on top.

General Motors Corp. will furlough entire shifts of workers at some truck factories and may move them to nearby car plants as it restructures to adjust to a rapidly changing U.S. market brought on by $4 per gallon gasoline.

General Motors Corp.'s stock dropped almost 5 percent Friday after the company reported that strikes at some of its own plants and parts supplier American Axle will cost the automaker about $2 billion before taxes in the second quarter.

Wall Street ended a week of big losses with more selling Friday as rising oil prices again raised worries that strained consumers will cut back spending and hurt the overall economy. The Dow Jones industrials fell nearly 150 points in the final session before the three-day holiday weekend.